1229887 has 4 divisors (see below), whose sum is σ = 1232136. Its totient is φ = 1227640.

The previous prime is 1229873. The next prime is 1229897. The reversal of 1229887 is 7889221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7889221 = 31 ⋅254491.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1229887 is a prime.

It is a d-powerful number, because it can be written as 1 + 2² + 2²⁰ + 9⁵ + 8³ + 8⁴ + 7⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288 + ... + 1594.

It is an arithmetic number, because the mean of its divisors is an integer number (308034).

2^1229887 is an apocalyptic number.

1229887 is a deficient number, since it is larger than the sum of its proper divisors (2249).

1229887 is an equidigital number, since it uses as much as digits as its factorization.

1229887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248.

The product of its digits is 16128, while the sum is 37.

The square root of 1229887 is about 1109.0027051365. The cubic root of 1229887 is about 107.1408457612.

It can be divided in two parts, 1229 and 887, that added together give a square (2116 = 46²).

The spelling of 1229887 in words is "one million, two hundred twenty-nine thousand, eight hundred eighty-seven".